It is 15 which is a rational number
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no square root of 9 is 3 which is rational -- to be more specific: an irrational number is a number that cannot be expressed as a fraction. Pi, for example, is one of these numbers. If a number is not a perfect square (4, 16, 9, 144, 225, etc.), then it's square root is likely to be an irrational number. For example, the square root of 2 (1.41421356...) is an irrational number because it cannot accurately be expressed as a fraction.
The square root of 225 is 15. This is because the square root of a number is a value that, when multiplied by itself, gives the original number. In this case, 15 multiplied by 15 equals 225. Therefore, the square root of 225 is 15.
Yes, the square root of 225 is ± 15 because 15 x 15 = 225 AND -15 x -15 = 225
± 15
The same way you find the square root of any number. The fastest way would be to type 225, followed by the square root key, in a calculator.